She attended the Convent of the Sacred Heart, an elite, all-girls school in Manhattan, before graduating from Brown University in 1977. She started her news career in 1979 as an anchor at WLNE-TV in Providence, Rhode Island. She moved to New York in 1982 to report at WNEW-TV (later WNYW-TV) and later at WABC-TV Eyewitness News. She also worked several years as a reporter and anchor for WNBC-TV's "Weekend Today in New York". She moved to WCBS-TV in 1994 as a reporter and morning anchor before being fired in October 1996 with six on-air colleagues, in an attempt to boost ratings.
After 9/11, she joined WNBC-TV (NBC 4) in New York City, where she worked as a correspondent from 2002-2003. She returned to WCBS in January 2003. In May 2011, she was informed by WCBS that her contract, which was due to expire in July, would not be renewed. Since September 2011, Hickey is a reporter for WPIX news and since July 2013 she is reporter for NY1 News until August 2014.
In 1983, she married S. Richolson Salembier  with whom she has two daughters.
- "Magee Hickey Wed to S. R. Salembier". The New York Times. May 22, 1983. Retrieved 2010-02-12.
- Huff, Richard (September 29, 2006). "10 Years Later, Hickey's Fired Up". Daily News (New York). Retrieved 2010-02-12.
- Starr, Michael (5 April 1999). "TV Ticker". New York Post. Retrieved 27 May 2014.
- "Inner Tube". Daily News (New York). January 31, 2003. Retrieved 2014-05-26.
- Huff, Richard (May 18, 2011). "Magee Hickey and WCBS/Ch. 2 Part Ways". Daily News (New York). Retrieved 2011-07-23.